40134209 has 2 divisors, whose sum is σ = 40134210. Its totient is φ = 40134208.

The previous prime is 40134169. The next prime is 40134217. The reversal of 40134209 is 90243104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 1507984 = 6215^2 + 1228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40134209 is a prime.

It is a super-2 number, since 2×40134209² = 3221509464111362, which contains 22 as substring.

It is equal to p_2441318 and since 40134209 and 2441318 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40134299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20067104 + 20067105.

It is an arithmetic number, because the mean of its divisors is an integer number (20067105).

Almost surely, 2^40134209 is an apocalyptic number.

It is an amenable number.

40134209 is a deficient number, since it is larger than the sum of its proper divisors (1).

40134209 is an equidigital number, since it uses as much as digits as its factorization.

40134209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40134209 is about 6335.1565884357. The cubic root of 40134209 is about 342.3772526204.

The spelling of 40134209 in words is "forty million, one hundred thirty-four thousand, two hundred nine".